The Brodie Compact Prover provides high accuracy, rapid operation and continuous flow for proving a flow meter in an operational line. This is accomplished without interrupting normal flow and without the use of manually operated bypass valves. Available with nominal flow tube sizes of 8″ to 40″, covering flow ranges of 0.25 GPM (0.946 LPM) to 17,500 GPM (66,237 LPM).